Element = Lattice = Model = Element: Ga
Lattice: hcp
Model: Sim_LAMMPS_Polymorphic_NordAlbeErhart_2003_GaN__SM_333071728528_000
Computed model cutoff of 3.0184892498702016 Angstroms
Computed isolated atomic energy of 0.0 eV for species Ga

==============================================================================
==============================================================================
 Starting optimization to find optimum lattice constant 'a' with c/a fixed to
 sqrt(8/3)
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = 1.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 2.809154891967778, total energy = -10.606902745380978

Attempting to perform relaxation using initial lattice constant guess of a = 1.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 43
         Function evaluations: 93
Results for this minimization:
  a = 2.8091551110148423, total energy = -10.606902745409673

Attempting to perform relaxation using initial lattice constant guess of a = 1.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.809155210852623, total energy = -10.60690274541106

Attempting to perform relaxation using initial lattice constant guess of a = 1.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.809155210107571, total energy = -10.60690274541109

Attempting to perform relaxation using initial lattice constant guess of a = 1.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8091554576065425, total energy = -10.606902745383739

Attempting to perform relaxation using initial lattice constant guess of a = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.809155108779671, total energy = -10.606902745409554

Attempting to perform relaxation using initial lattice constant guess of a = 1.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 37
         Function evaluations: 83
Results for this minimization:
  a = 2.809154960140586, total energy = -10.606902745393658

Attempting to perform relaxation using initial lattice constant guess of a = 1.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.8091552845726255, total energy = -10.606902745428718

Attempting to perform relaxation using initial lattice constant guess of a = 2.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 2.8091551795601863, total energy = -10.606902745411391

Attempting to perform relaxation using initial lattice constant guess of a = 2.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 2.809155188500883, total energy = -10.60690274541141

Attempting to perform relaxation using initial lattice constant guess of a = 2.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 36
         Function evaluations: 82
Results for this minimization:
  a = 2.80915517974645, total energy = -10.606902745411398

Attempting to perform relaxation using initial lattice constant guess of a = 2.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 37
         Function evaluations: 83
Results for this minimization:
  a = 2.809155254065991, total energy = -10.606902745409432

Attempting to perform relaxation using initial lattice constant guess of a = 2.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 34
         Function evaluations: 75
Results for this minimization:
  a = 2.8091552258701995, total energy = -10.60690274541072

Attempting to perform relaxation using initial lattice constant guess of a = 2.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 34
         Function evaluations: 77
Results for this minimization:
  a = 2.8091553429840137, total energy = -10.606902745401918

Attempting to perform relaxation using initial lattice constant guess of a = 2.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 35
         Function evaluations: 77
Results for this minimization:
  a = 2.8091553576290598, total energy = -10.606902745400152

Attempting to perform relaxation using initial lattice constant guess of a = 2.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 34
         Function evaluations: 77
Results for this minimization:
  a = 2.8091550815588557, total energy = -10.606902745407698

Attempting to perform relaxation using initial lattice constant guess of a = 3.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 34
         Function evaluations: 76
Results for this minimization:
  a = 2.809155037254094, total energy = -10.606902745403783

Attempting to perform relaxation using initial lattice constant guess of a = 3.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -10.606903
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.809155183203984, total energy = -10.606902745411395

Attempting to perform relaxation using initial lattice constant guess of a = 3.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.25, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.375, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.5, total energy = 0.0

==============================================================================
==============================================================================
 Starting optimization with both a and c/a relaxed
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 3.6698650962377632 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.374662
         Iterations: 87
         Function evaluations: 183
Results for this minimization:
  a = 4.116504315483022, c = 2.6650101002432143, total energy = -11.374661922620641

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 3.8992316647526235 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 74
         Function evaluations: 166
Results for this minimization:
  a = 2.788198727710813, c = 4.650684940570342, total energy = -10.62122520273717

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 4.128598233267484 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 68
         Function evaluations: 153
Results for this minimization:
  a = 2.788198858918794, c = 4.650684735975785, total energy = -10.621225202737888

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 4.3579648017823445 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 76
         Function evaluations: 165
Results for this minimization:
  a = 2.7881987543185316, c = 4.650685061332194, total energy = -10.621225202738247

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 4.587331370297204 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 69
         Function evaluations: 152
Results for this minimization:
  a = 2.7881987073844594, c = 4.6506850434180755, total energy = -10.62122520273749

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 4.816697938812064 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 75
         Function evaluations: 169
Results for this minimization:
  a = 2.788198773345621, c = 4.650685090943511, total energy = -10.62122520273827

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 5.046064507326925 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 85
         Function evaluations: 177
Results for this minimization:
  a = 2.788198595016005, c = 4.650685531743143, total energy = -10.62122520273717

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 5.2754310758417855 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 88
         Function evaluations: 185
Results for this minimization:
  a = 2.7881989041542687, c = 4.650684728021952, total energy = -10.621225202737937

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915528] Angstroms and c = 5.504797644356645 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -9.275146
         Iterations: 91
         Function evaluations: 216
Results for this minimization:
  a = 2.692656664874201, c = 5.815276966669899, total energy = -9.275146296845275